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* changes: feat(spmd): allow forwarding of FFA_FRAG_RX/TX calls feat(spmc): add support for FFA_SPM_ID_GET feat(spmc): add support for forwarding a secure interrupt to the SP feat(spmc): add support for FF-A power mgmt. messages in the EL3 SPMCpull/1986/head
Olivier Deprez
3 years ago
committed by
TrustedFirmware Code Review
TrustedFirmware Code Review
9 changed files with 576 additions and 16 deletions
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/*
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* Copyright (c) 2022, ARM Limited and Contributors. All rights reserved. |
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* |
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* SPDX-License-Identifier: BSD-3-Clause |
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*/ |
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#include <assert.h> |
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#include <errno.h> |
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#include <lib/el3_runtime/context_mgmt.h> |
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#include <lib/spinlock.h> |
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#include <plat/common/common_def.h> |
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#include <plat/common/platform.h> |
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#include <services/ffa_svc.h> |
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#include "spmc.h" |
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#include <platform_def.h> |
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/*******************************************************************************
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* spmc_build_pm_message |
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* |
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* Builds an SPMC to SP direct message request. |
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******************************************************************************/ |
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static void spmc_build_pm_message(gp_regs_t *gpregs, |
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unsigned long long message, |
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uint8_t pm_msg_type, |
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uint16_t sp_id) |
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{ |
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write_ctx_reg(gpregs, CTX_GPREG_X0, FFA_MSG_SEND_DIRECT_REQ_SMC32); |
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write_ctx_reg(gpregs, CTX_GPREG_X1, |
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(FFA_SPMC_ID << FFA_DIRECT_MSG_SOURCE_SHIFT) | |
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sp_id); |
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write_ctx_reg(gpregs, CTX_GPREG_X2, FFA_FWK_MSG_BIT | |
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(pm_msg_type & FFA_FWK_MSG_MASK)); |
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write_ctx_reg(gpregs, CTX_GPREG_X3, message); |
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} |
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/*******************************************************************************
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* This CPU has been turned on. Enter the SP to initialise S-EL1. |
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******************************************************************************/ |
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static void spmc_cpu_on_finish_handler(u_register_t unused) |
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{ |
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struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
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struct sp_exec_ctx *ec; |
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unsigned int linear_id = plat_my_core_pos(); |
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entry_point_info_t sec_ec_ep_info = {0}; |
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uint64_t rc; |
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/* Sanity check for a NULL pointer dereference. */ |
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assert(sp != NULL); |
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/* Initialize entry point information for the SP. */ |
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SET_PARAM_HEAD(&sec_ec_ep_info, PARAM_EP, VERSION_1, |
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SECURE | EP_ST_ENABLE); |
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/*
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* Check if the primary execution context registered an entry point else |
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* bail out early. |
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* TODO: Add support for boot reason in manifest to allow jumping to |
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* entrypoint into the primary execution context. |
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*/ |
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if (sp->secondary_ep == 0) { |
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WARN("%s: No secondary ep on core%u\n", __func__, linear_id); |
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return; |
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} |
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sec_ec_ep_info.pc = sp->secondary_ep; |
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/*
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* Setup and initialise the SP execution context on this physical cpu. |
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*/ |
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spmc_el1_sp_setup(sp, &sec_ec_ep_info); |
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spmc_sp_common_ep_commit(sp, &sec_ec_ep_info); |
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/* Obtain a reference to the SP execution context. */ |
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ec = spmc_get_sp_ec(sp); |
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/*
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* TODO: Should we do some PM related state tracking of the SP execution |
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* context here? |
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*/ |
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/* Update the runtime model and state of the partition. */ |
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ec->rt_model = RT_MODEL_INIT; |
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ec->rt_state = RT_STATE_RUNNING; |
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INFO("SP (0x%x) init start on core%u.\n", sp->sp_id, linear_id); |
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rc = spmc_sp_synchronous_entry(ec); |
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if (rc != 0ULL) { |
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ERROR("%s failed (%lu) on CPU%u\n", __func__, rc, linear_id); |
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} |
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/* Update the runtime state of the partition. */ |
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ec->rt_state = RT_STATE_WAITING; |
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VERBOSE("CPU %u on!\n", linear_id); |
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} |
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/*******************************************************************************
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* Helper function to send a FF-A power management message to an SP. |
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******************************************************************************/ |
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static int32_t spmc_send_pm_msg(uint8_t pm_msg_type, |
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unsigned long long psci_event) |
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{ |
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struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
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struct sp_exec_ctx *ec; |
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gp_regs_t *gpregs_ctx; |
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unsigned int linear_id = plat_my_core_pos(); |
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u_register_t resp; |
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uint64_t rc; |
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/* Obtain a reference to the SP execution context. */ |
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ec = spmc_get_sp_ec(sp); |
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/*
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* TODO: Should we do some PM related state tracking of the SP execution |
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* context here? |
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*/ |
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/*
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* Build an SPMC to SP direct message request. |
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* Note that x4-x6 should be populated with the original PSCI arguments. |
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*/ |
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spmc_build_pm_message(get_gpregs_ctx(&ec->cpu_ctx), |
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psci_event, |
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pm_msg_type, |
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sp->sp_id); |
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/* Sanity check partition state. */ |
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assert(ec->rt_state == RT_STATE_WAITING); |
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/* Update the runtime model and state of the partition. */ |
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ec->rt_model = RT_MODEL_DIR_REQ; |
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ec->rt_state = RT_STATE_RUNNING; |
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rc = spmc_sp_synchronous_entry(ec); |
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if (rc != 0ULL) { |
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ERROR("%s failed (%lu) on CPU%u.\n", __func__, rc, linear_id); |
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assert(false); |
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return -EINVAL; |
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} |
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/*
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* Validate we receive an expected response from the SP. |
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* TODO: We don't currently support aborting an SP in the scenario |
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* where it is misbehaving so assert these conditions are not |
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* met for now. |
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*/ |
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gpregs_ctx = get_gpregs_ctx(&ec->cpu_ctx); |
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/* Expect a direct message response from the SP. */ |
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resp = read_ctx_reg(gpregs_ctx, CTX_GPREG_X0); |
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if (resp != FFA_MSG_SEND_DIRECT_RESP_SMC32) { |
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ERROR("%s invalid SP response (%lx).\n", __func__, resp); |
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assert(false); |
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return -EINVAL; |
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} |
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/* Ensure the sender and receiver are populated correctly. */ |
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resp = read_ctx_reg(gpregs_ctx, CTX_GPREG_X1); |
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if (!(ffa_endpoint_source(resp) == sp->sp_id && |
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ffa_endpoint_destination(resp) == FFA_SPMC_ID)) { |
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ERROR("%s invalid src/dst response (%lx).\n", __func__, resp); |
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assert(false); |
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return -EINVAL; |
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} |
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/* Expect a PM message response from the SP. */ |
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resp = read_ctx_reg(gpregs_ctx, CTX_GPREG_X2); |
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if ((resp & FFA_FWK_MSG_BIT) == 0U || |
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((resp & FFA_FWK_MSG_MASK) != FFA_PM_MSG_PM_RESP)) { |
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ERROR("%s invalid PM response (%lx).\n", __func__, resp); |
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assert(false); |
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return -EINVAL; |
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} |
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/* Update the runtime state of the partition. */ |
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ec->rt_state = RT_STATE_WAITING; |
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/* Return the status code returned by the SP */ |
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return read_ctx_reg(gpregs_ctx, CTX_GPREG_X3); |
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} |
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/*******************************************************************************
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* spmc_cpu_suspend_finish_handler |
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******************************************************************************/ |
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static void spmc_cpu_suspend_finish_handler(u_register_t unused) |
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{ |
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struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
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unsigned int linear_id = plat_my_core_pos(); |
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int32_t rc; |
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/* Sanity check for a NULL pointer dereference. */ |
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assert(sp != NULL); |
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/*
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* Check if the SP has subscribed for this power management message. |
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* If not then we don't have anything else to do here. |
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*/ |
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if ((sp->pwr_mgmt_msgs & FFA_PM_MSG_SUB_CPU_SUSPEND_RESUME) == 0U) { |
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goto exit; |
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} |
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rc = spmc_send_pm_msg(FFA_PM_MSG_WB_REQ, FFA_WB_TYPE_NOTS2RAM); |
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if (rc < 0) { |
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ERROR("%s failed (%d) on CPU%u\n", __func__, rc, linear_id); |
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return; |
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} |
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exit: |
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VERBOSE("CPU %u resumed!\n", linear_id); |
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} |
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/*******************************************************************************
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* spmc_cpu_suspend_handler |
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******************************************************************************/ |
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static void spmc_cpu_suspend_handler(u_register_t unused) |
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{ |
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struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
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unsigned int linear_id = plat_my_core_pos(); |
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int32_t rc; |
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/* Sanity check for a NULL pointer dereference. */ |
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assert(sp != NULL); |
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/*
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* Check if the SP has subscribed for this power management message. |
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* If not then we don't have anything else to do here. |
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*/ |
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if ((sp->pwr_mgmt_msgs & FFA_PM_MSG_SUB_CPU_SUSPEND) == 0U) { |
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goto exit; |
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} |
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rc = spmc_send_pm_msg(FFA_FWK_MSG_PSCI, PSCI_CPU_SUSPEND_AARCH64); |
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if (rc < 0) { |
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ERROR("%s failed (%d) on CPU%u\n", __func__, rc, linear_id); |
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return; |
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} |
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exit: |
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VERBOSE("CPU %u suspend!\n", linear_id); |
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} |
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/*******************************************************************************
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* spmc_cpu_off_handler |
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******************************************************************************/ |
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static int32_t spmc_cpu_off_handler(u_register_t unused) |
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{ |
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struct secure_partition_desc *sp = spmc_get_current_sp_ctx(); |
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unsigned int linear_id = plat_my_core_pos(); |
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int32_t ret = 0; |
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/* Sanity check for a NULL pointer dereference. */ |
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assert(sp != NULL); |
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/*
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* Check if the SP has subscribed for this power management message. |
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* If not then we don't have anything else to do here. |
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*/ |
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if ((sp->pwr_mgmt_msgs & FFA_PM_MSG_SUB_CPU_OFF) == 0U) { |
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goto exit; |
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} |
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ret = spmc_send_pm_msg(FFA_FWK_MSG_PSCI, PSCI_CPU_OFF); |
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if (ret < 0) { |
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ERROR("%s failed (%d) on CPU%u\n", __func__, ret, linear_id); |
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return ret; |
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} |
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exit: |
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VERBOSE("CPU %u off!\n", linear_id); |
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return ret; |
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} |
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/*******************************************************************************
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* Structure populated by the SPM Core to perform any bookkeeping before |
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* PSCI executes a power mgmt. operation. |
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******************************************************************************/ |
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const spd_pm_ops_t spmc_pm = { |
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.svc_on_finish = spmc_cpu_on_finish_handler, |
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.svc_off = spmc_cpu_off_handler, |
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.svc_suspend = spmc_cpu_suspend_handler, |
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.svc_suspend_finish = spmc_cpu_suspend_finish_handler |
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}; |
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